ADP7105ACPZ-R7

Overview

The ADP7105ACPZ-R7 is a CMOS low dropout linear regulator from Analog Devices, operating within an input voltage range of 3.3 V to 20 V and delivering up to 500 mA of output current. It provides fixed output options including 1.8 V, 3.3 V, and 5 V, alongside an adjustable version spanning 1.22 V to 19 V. The device features low noise performance with 15 µV rms for fixed outputs and achieves a power supply rejection ratio of 60 dB at 10 kHz. It incorporates reverse current protection, programmable soft start, foldback current limiting, thermal overload protection, and a user-programmable precision UVLO/enable function.

Feature Summary

• Low noise architecture providing 15 µV rms output noise for fixed voltage versions
• High power supply rejection ratio of 60 dB at 10 kHz
• Reverse current protection capability
• Programmable soft start for inrush current control

Applications

• Regulation of ADC and DAC circuits
• Precision amplifiers and high frequency oscillators
• Clocks and PLLs
• Communications and infrastructure systems
• Medical and healthcare equipment

Procurement Notes

Verify the specific suffix R7 indicates reel packaging when sourcing. Confirm the package type matches the required LFCSP or SOIC form factor. Ensure the ordering code corresponds to the desired fixed or adjustable output voltage variant. Check datasheet specifications for minimum capacitance requirements to maintain stability.

Selection Notes

Select this component for applications requiring high input voltages up to 20 V with low noise regulation. Consider the 1 µF ceramic output capacitor requirement for stability. Evaluate thermal dissipation based on the junction-to-ambient resistance of the chosen package. Verify that the load transient response meets system demands given the small output capacitance.

Part Context

This part belongs to the ADP7105 family of high input voltage LDO regulators. It utilizes an advanced proprietary architecture to achieve excellent line and load transient response. The series supports both fixed and adjustable output configurations, making it versatile for various analog and mixed-signal circuit regulation needs.

Replacement Considerations

Check for direct pin-compatible alternatives within the Analog Devices portfolio that match the 500 mA current rating and 20 V input limit. Verify equivalent noise and PSRR specifications if replacing in noise-sensitive designs.